Eugene schneider



Aug. 26, 1919. E. SCHNEIDER LIQUID TRANSMISSION Filed Aug. 21, 1918 W|I|IIHHIIIIH I III "II HHH I III lmnh mn.

INVENTOR.

BY 1444M,

ATTORNEYS.

fully set forth in the EUGENE SCHNEIDER, 0F PARIS, FRANCE,

FRANCE, A LIMITED JOINT- ASSIGNOR T0 SCHNEIDER & CIE., OF PARIS, STOCK COMPANY OF FRANCE.

LIQUID TRANSMISSION.

To all whom it may concern:

Be it known that I, EUGENE SCHNEIDER, a citizen of the French Republic, and a resident of 42 Rue dAnjou, Paris, France, have invented a new and useful Improvement in Liquid Transmission, which invention is following specification.

The present invention relates to apparatus for producing movement by means of a fluid under pressure, and it has for its ob ject to provide improved apparatus of this type for transmitting motion to a suitable member, such as a piston or diaphragm mov able in a cylinder and controlling by its spindle or rod, or by that rod and a counter or tail rod, mechanism such as clutch members, valves, hinged flaps or other contrivances. l

The improved apparatus is characterized by the fact that the bodies of liquid, receiving pressure which is transmitted respectively to the two faces of the reciprocating piston, are separate one from the other, rc main constant in volume and are each contained in the compartment between a face of the piston and the corresponding end of the cylinder and a chamber which com municates adjacent its bottom with said compartment. The space abovethe surface of the liquid in each chamber, adjacent its upper vend, can be placed alternately in communication with a conduit forthe admission of a fluid under pressure to the said space and a conduit that serves for the exhaust of the fluid so admitted.

According to this invention, the distributing devices, by which the spaces above the surface of the liquid in the two chambers are placed alternately in communication with the admission and exhaust conduits, are so disposed that they may be operated by a single lever, whereby either one of the chambers may be placed in communication with the admission conduit while the other is at the same time automatically placed in communication with the exhaust conduit.

The invention is capable of receiving a variety of mechanical expressions, one of which is shown on the accompanying drawing, but it is to be expressly understood that the drawing is for purposes of illustration only and is not to be construed as a definition of the limits of the invention, reference being had to the appended claims for that purpose.

Specification of Letters Patent.

Patented Aug. 26, 1919.

Application filed August 21, 1918. Serial No. 250,871.

Said drawing represents a sectional elevation of one embodiment of the invention.

In said drawing, A denotes a piston that moves in a fluid-tight manner in a cylinder B, and transmits, by means of its spindle or rod a and also, if need be, by a tail rod (1., the reciprocatin movements which are given to it by a liquid under pressure. The cylinder B communicates, ad acent its two ends as at b and b respectively, with the two chambeis C and C, which, though they may be coupled together or be integrally formed, constitute separate compartments. Communication is established between the inlet passages 12 and b and the lower part of the chambers C and C by means of the tubes D and D, each of which is fitted with a cock at or d for controlling the volume of the flow of liquid through said tubes.

A body of liquid, which always remains constant in volume is contained in the space above the upper face of piston A and in chamber C, the communicating tube D and the upper compartment of cylinder B being maintained constantly full and the liquid in chamber C varying in level according toithe osition of the iston. Another separate liody of liquid 1s contained in the space below the lower face of piston A and in chamber C, the lower compartment of cylinder B and tube D being maintained constantly full and the level of the liquid in chamber C varying according to the position of the piston.

Each of thechambers G, C communicates adjacent its upper part, at a and 0' respectively, with a distributing device adapted to place the space above the surface of the liquid in chambers C and O alternately in communication with a supply of fluid under pressure and with an exhaust outlet.

In the form shown, each distributer is arranged to. maintain the space above the liquid in the chambers normally in communication with the exhaust outlet so long as the distributing device is not manually or otherwise actuated, and to reestablish automatical ly this condition when the controlling :mem'ber ceases to act. The distributers are so disposedthat they can be alternately actuated by a single member, such as a lever, common to both.

E and E' denote tubes or ductscommunicatingwith a source of as or other flu1d under pressure. The inlets for the fluid to the passages c, -c' are normally closed by I provided with an axial conduit H, H which v normally maintains communication between the passages 0, and the exhaust outlets F, F. The valves may be raised by one or the other of the arms of a lever I,'I' pii oted at i which operates corresponding push rods J, J normally retained out of action, or away from the corresponding valves, by springs j, j. Each push rod, the movements of which are limited by a stop K, K, when it raises a valve also closes the, lower end of the axial conduit therethrough, thus cuttin 01f communication between the chamber an the exhaust outlet.

The apparatus operates as follows:

- T e lever I-I' being operated, for example, in the direction of the arrow X, acts on the push rod J .andraises thereby the valve G's Air or gasunder pressure, admitted through the tube E, passes through the opening around the lifted valve G and the passage 0 into the chamber C'. presses upons the liquid therein causing some of it to flow through the tube D into cylinder B where it acts on piston A which is displaced in the direction of the arrow Y.

Meanwhile, the arm I of the lever being lowered, the push rod J, under the action of its spring j, descends .and' allows the tional area of the passages through tubes valve G- to engage its seat thereby opening the vconduitlH through which the air or gas under pressure in the upper part of cham ber C escapes to the atmosphere by means of the exhaust orifice F. p

The pressure in chamber C being relleved,

' as piston A rises, the liquid from the upper compartment of cylinder B returns through tube D into the chamber C. v

If lever IIV be moved in. the reverse direction, valve G willbe raised and valve G. will return to its seat. The; pressure exerted on the liquid in chamber C will betransmitted tothe upper face of "piston A and move the latter in a direction reverse to that indicated by the arrow Y, Whilethe j pressure in chamber C will be relieved and the liquid from the lower compartment of cylinder B return to chamber C.

By operating the cooks d, d, the cross sec;

D, D can be modified and the speed of flow of the liquid therethrough varied, and consequently the'speed at which the apparatus works can be regulated.

With the aid ,of suitable independent f cocks, seve'ral cylinders, such as B, can be supplied with liquid from a single group of chambers, such as chambers G, C, if properly provided with distributing devices.

' specification.

The lever II' can be operated by hand or mechanically. When the lever is turned into its mean position, indicated in broken lines, the apparatus will be at rest, with no pressure acting on the surface of the liquid M that the invention is not to be restricted thereto, as the same is capable of receiving a varlety of mechanical expressions. Reference 1s to be had to the claims hereto appended for a definition of the limits of the K invention.

What is claimed is 1. 'In combination with a cylinder and piston, liquid-containing chambers, ducts constituting means of communication between the compartments in the cylinder on eitherside of the piston and the respective chambers, said ducts and. compartments being constantly full ofliquid, fluid passages in continuous communication with said chambers above the surface of the liquid therein, valves controlling the admission of fluid under pressure to said passages, passages extendingv axially through said valves. and in. continuous communication with said firstnamed passages, exhaust outlets normally in communication with said axial passages,

and controlling means foropening either of said valves and simultaneously closing the axial passage therethrough. y

--2. In combination with a cylinder and piston, liquid-containing chambers, ducts constituting means of communication between the compartments in the cylinder on either side of the piston and the respective chambers, said ducts and compartments being constantly full of liquid, fluid passages in continuous communication with said chambers above the surface of the liquid therein, valves controlling the admission of fluid under pressure to said passages, passages extending axially through said valves and in continuous communication with said first-named passages, exhaust outlets normally in communication with said axial passages, movable members adapted to engage the respective valves to first clOSe the axial passages therethrough and thereafter move said valves, and controlling means adapted to actuate either of said movable'members. In testimony whereof I have signed this EUGENE SCHNEIDER. Witnesses:

P ANDRE Mosrroxnn, JOHN F. SIMoNs. 

